[REF] initial prototype of owl 2

tests/blockdom/helpers.ts

@@ -0,0 +1,11 @@
+let lastFixture: any = null;
+
+export function makeTestFixture() {
+  let fixture = document.createElement("div");
+  document.body.appendChild(fixture);
+  if (lastFixture) {
+    lastFixture.remove();
+  }
+  lastFixture = fixture;
+  return fixture;
+}